Technical Summary
- Category: High Alloy Tool Steel
- Manufacturer: Bohler-Uddeholm
- Process: PM
- Ratings: Toughness 5.5, Edge 7.5, Corrosion 4
- HRC Range: 62-65
Source attribution: Knife Steel Nerds and SteelHardnessLab.
High Alloy Tool Steel / Bohler-Uddeholm
K390
Toughness 5.5/10, Edge Retention 7.5/10, Corrosion Resistance 4/10. Target hardness range: 62-65 HRC.
Known aliases: Bohler K390, K390 PM.
Chemical Composition
| C | 2.47% |
|---|---|
| Cr | 4.2% |
| V | 9.0% |
| Mo | 3.8% |
| W | 1.0% |
| Co | 2.0% |
SteelHardnessLab Testing Data
Testing recognition: u/679696 and u/Skylark427.
| Manufacturer | Samples | Avg HRC |
|---|---|---|
| Spyderco | 1 | 65.3 |
| Spyderco | 5 | 63.8 |